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E. E..KLE!NSCHMD'. KEYBoARnELEGRAVPHIc IRANSMHTER.

APPucATxoM Flnmn. 1u, 19m.. v,

Patented Sept. 30, 19W.,

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E. E, KLEINSCHMIDY.

KEYBOARD IELEGRAPHW IRANSMHTER.

HL'ED1AN.11,1915.

APPLICATION n Mtente Sept. 30, 1919.

6 SHEE l S--SHEET 4A i,aiaeee.

retiren srarns narrar newest E. minrnscnmnr, or Bnoomrn, nnw'ronn,Assiettes 'ro KLEnsonnrnr ELECTRIC COMPANY, me., or BROOKLYN, NEW Yoan,.a oonrornrron or 'naar KEYBOBD TELEGR'APHIC TRANSB'IITTER.

To ali whom 1i may concern:

Be it known that l, EDWARD E. KLEIN- sCHMin/r, a citizen of the UnitedStates, and a resident of the borough of Brooklyn, city and State of NewYork, have invented cer tain new and useful improvements in KeyboardTelegraphic Transmitters, of whlch the following is a specification.

The present invention` relates to a keyboard transmitter adapted tostore signals in advance of' transmission and it is in` tended for useprincipally with printing l'telegraphs having acode of unit length.

The purpose out' this 'intention is to pro-' vide a. simple andefficient transmitter Wherein the operation of the keyboard 1sindependent of the transmission of the signals and vtothereby renderunnecessary extreme care on the part ot' the operator to preventstriking keys too rapidly in succession. ilse by storing signals inadvance of their transmission, to permit a constant and regulartransmission of signals at an even speed, and at the saine timepermitting the operator to strike lreys'fast or slow, or to pause forchanging or marking messages without affecting 0r stopping thetransmission. y y

ln carrying out this invention, l have` provided astorage member whichholds scparated groups of .pins adapted to be set in transmitting andnon-transmitting positions by a'kcyboar'd selecting mechanism. separatedgroup of pirs in thel storage member represents a character or s vmholto be transmitted. After a. group of pins is set up in the storagemember, it is advanced a distance otone group'by a solenoid magnet incircuit with a contact operated by the keyboard. l prefer to separatethe group of v pins or circuit controllers so that the operator may1easily read the characters he has set up in the storage member. Thisstorage memlier is preferably inthe form of a wheel.

Mounted centrally with the storage Wheel lint separate therefrom) is atransmitting head. a sel'. oi circuit closcrs equal inl number to agroup ot pins. The circuit closers arc iliressed .against successivegroups of pins Each in the transmitting head is mounted' and their openor closedposition is eidected by pins set in either transmitting ornontransnntting positions. Also mounted "in the transmitting head is amagnet@ which Y acts to 'Withdraw the circuit closers Jironithevpinsvvvhiler the transmitting head .is rotated to engagethe next group.4Between the transmitting head and the storage Wheel 1s an escapernentmechanism which is oper# ated by the magnet 4ot the transmitting1 headand allows. the latterto turn. relative to the storage wheeL- one stepor the distance lof one group of pms each time the magnet of vthetransmitting head is enerf. 1;ized.l

To transmit signals from the transmitting head to the line and receivingapparatus, I provide a master transmitter.' This de vice comprises acommutator having segments corresponding in number tothe cir-Specication of Letters Patent. Y 'Patented Sept, 3Q?? jigljl.,

cuit closers of the transmittinghead. )Conf tacting with these is 'abrush carried by a shaft which `is rotated at a constant speed. Thisbrush is coimected to the line. and the segments are individuallyconnected to the circuit closers. An'extra segment and brash" isprovided t0 control the circuit o the magnet mounted in the transmittinghead.

In using my transmitter, the speed With which the brush4 of the mastertransmitter revolves is set to approximately the speed at which .thereceiving apparatus will Work most satisfactory. `As the operatorstrikes vthe keys corresponding symbols are set up in the storage Wheeland it is advanced step hy stepby the solenoid magnet. The Ibrushes ofthe master transmitter revolve at regular intervals and with eachrevolution the circuit of the magnet in the twnsmitting head isclosed/and the escapement between the transmitting head and the storageWheel operated, thereby allowing the transmitting head to turn step bystep in a direction oppol site to that of 4the storage wheel. W ith eachstep of the transmitting head the circuit closers mounted thereon arebrought in contact with the raisedy pins of a group thereby' closingcontacts in circuit which 'circuits` include segments in the eommutato'rof t the transmitter. v transmitting head are held in' position againstthe ralsed pins during the entire time The circuit closers of the lo@that the line brush is travelingv over the segments of the mastertransmitter and since the' brush connects successively with the com--mutator segments, the characters set up in the storage Wheel will betransmitted to the Iline land the receiving apparatus at a uniform speed'by the master transmitter.

To enable the operator to reset a group of pins, or in other Words erasea signal, I have I)"rovided a key in the keyboard Which is nnectcd to a-lever carrying a plate large enough to depress an entire group of pinsand to another lever which carries a feed pawl and acts to turn thestorage Wheel in a direction reverse from that Which it is moved i whenit is advanced by the solenoid magnet.

In using my transmitter for sending code Words, it is advisable that thesetting up of the characters shall be at least ten` letters ahead of thetransmitting so that .the opera- `tor may check up each Word before itistransmitted. `'I'o prevent the transmitting from coming closer than aspace of ten letters to the setting up mechanism, I provide acircuitbreaker operated by the position off the transmitting head andincluded in the circuihof the escapement magnet, which acts to open thecircuit of the latter when the transmitting head approaches to Withinten carrying a pointer which moves over a graduated scale. Each step ofthe'ratchet represents the spa/ce occupied by a letter in a line.. Theratchet is advanced step by step by a feed pawl that is mechanicallyconnected to the lever that advances the storage .Wheeh When the ppintershows that the number of characters are nearly suicient to fill a line,a. contact controlled by the ratchet is made and a Warning lamp lighted.Operated by' the carriage return key is a release mechanism forreturning Vthe ratchet and pointer to the zero posit1on.

The invention Will be understood by reference to the accompanyingdrawings in Which- Figure 1- is a side elevation of the completemachine, Fig. 2 is a sectional side elevation taken through the centerof the machine; Fig. 3 is a rear elevation of 'the top part of themachine; Fig. 4f 'is a sectional l plan View taken under the top plateofthe machine; Fig. 5 is a detail plan view showing the storage wheel;Fig. 6 1s a detail of the escapement; Fig. 7 is a diagram showing theconnections between the' transmitting head and the segments of acommutator similar to that used in the Baudot system,i also theconnections to the circuitvfor the operating solenoid; Fig. 8 is a.detail showing the methodof operating'the'revcrse feed lever from thekeyboard; Fig. 9 is a planv view of the character counter; Fig. 10 adetail of the same'and' Fig. 11 is a detail of the deisuressing shoe.

imilar reference numerals indicate similar parts in several views.

Fig. 1'- shows a keyboard selecting mechanism similar to that used in mykeyboard tape perforator patented Feb. 3, 191,4,

#1,085,985. In the present machine 'Fused' l number lxlesignates thekeys which Operate selecting bars 2. The selecting bars are notched torepresent the various combinations comprising the code .and operate'T ba3. The motion of the T bar is impartev1 .i J the link '-1 by aconnecting bar 5. The r per end of the connecting link f1 is connectedto a lever 6. When a key bar is depressed a combination of T bars isalso depressed and their motion imparted to the levers 6 which pressesupward a similar .combination of circuit controllers 7, Figs. 1, 2 and5.

Operated by a separate T bar 8'is a bar similar to the Ibars 5, shown inFigs. 1 and 2, and carrying a contact 9 'in circuit with vthe storageWheel advancing solenoid 10.

When a key bar is depressed the contact 9 is closed and solenoid 10energized.' The plunger of solenoid 10 is connected to one end of alover 11- as shown in Fig. 4. This lever turns about a fulcrum 12 vandhas connected to its opposite end a feed pavvl 1B, which engages theratchet wheel 14, Figs. 2, 3 and 4. The ratchet Wheel 14 is connected toa tubular shaft 15 Which carries at its upper end the storage wheel 16.Also connected Vto the tubular shaft 15 is a ratchet Wheel 17, the teethof which are cut reverse to the ratchet 14. Engaging with theformel-vis.

Ya stud 26 mounted in the base 24 and engages with the projecting studs13', 1S', 19 and 20 of pawls 13, 18, 19 and 20. The normal positionofthe interlocking member 25 is the position 4shown inthe drawica i lterrines ings.` Attached ,to the lever 11 is a stud 11';y

which when the formez is operated to with' draw the lfeed pawl 13from-position, en gages the inclined surface 25 of vthe inter ieerinfrmember 25,l ycausin it to turn about its ful'crum '26 and lift romengagement with ratchet 17vthe pawls 18 and 19, allowing the ratchet17,' tubular shaftl andl storage Wheel 16 to turn when fed forward v1olby thereturn motionof the feed pawl 13.

A-stud 21 is setfin lthe lever'21andects f on the-inclined surface '252to Vturnv the interlocking member 25 in the opposite ldirection -ltinApawls 13 and 20', W en lever 21 15 isuoperete' to turn'theratchet wheel17. lt will he seen from :the description and 'drawings that thisarrangementl of interlocking member with' 'the paivls and vfeed, leversacts 'to definitely lock the turning movement of y20 the sterili; Wheelat the end of every feedv ,inggimp and permits the turning of thestoragewheel-in either direction.

The ylever 11 `is held in its retracted posi- Vtion by a spring 112andacts to advance the .25 storage wheel when' the solenoidzlOisxdeenergized uponl releasing cfa key in the.vv

keyboard. A The lever 21 is operatedl by or erasure bar 27ca`rrying atthe 'opposite end a connecting link 28 which connects with aA bell crank29 pivotedin brackets 30 and imparting its motion to the lever 21 by apin and socket connection 29, as shown in Fig. 8. When the erasure bar27 is depressed the lever 21 is operated to draw 'the pawl 18 backwardone tooth and when the bar 27 is released the spring 21,2 acts to returnthe lever 21 and erasure bar 27 to their normal positlon.

Attached to the bell crank 4.0. 2S isa lever 31 which connects with adepressing member 32 through the link 31. When the erasure key 27 isdepressed the depressing member 32 is, brought down against a set ofraised pins 7 restoring them to their. non-transm1tting positions andwhen the 'erasure key 27 is released the storwheel is'turned back onestep thus crasing-a character.

The signals are transmitted from the pins olf the storage wheel by aItransmitting head 33 carried bya tubular shaft'-li, which has bearingin the tubular shaft 15. lower end of the tubular shaft -l is fastened agear.' 34 engaging with a gear segment 55 which is pivotod in thcframe.v To the segment 35de connected a spring 35", the ten- Siouofwhich acts upon thc tormcrcausing it 't'o turn the transmitting hoadabout'its axis in a direction opposite to that of the storage whccl,whcn that is advanced bv the lever 11. u

Mounted on thc transmitting heads are magnets 5N', which when encrgizrulattract an al'rmiturc-lT (sec Fig.- 2). The armature G5 37 is carried bya bracket 3,7 which is fase back space To the tened to a.frame 38mounted to slide in the transmitting head 33 and held in a retractedposition by vthespring 38. To the under side of the frame 38 arefastened eseapeinent dogs 39 which engage a ratchet 4:0 fastened to thestore e wheel 16 as shown in lFig.v 6.

` The. num er of teeth in the ratchet Wheel '40 correspondsfto thenumber of grou-ps of pins inthe storage wheel and each time the magnet36 is energized and denergized escapement-dogs 39 acting upon the teethof the ratchet 40 allow the transmitting head toturn .a distance equalto one group of pins. Also mounted -in the transmitting head 1s a groupof circuit closeis in the form'ofbell cranks 41, each carrymg .on4 onearm a courl tact 4 1 which is held 1n open circuit position -by a spring42. The actionoi" the spring 38 4is to draw the frame 38 in a forwardzirection' causing the lower arms of the bell cranks 41 to engage Withsuch pins of the Referring to Fig 7,43 represents a master transmitteror the distributer useclin the Baudet system. 'The arm 'et carrymgbrushes 45 and 46 rotates at a. uniform speed and in doing so thebrushes'contact with the storage Wheel as have been set intotransrni'tting position, and Iby turifiing the bell cranks close thevcorresponding contacts d1 with contact blocks e segments in thecommutator rines. li have y .hown a set of these segments, and Econnected to thecontactblocks e7 of the transmitting headu The4connections between thel contact blocks li' and the seg-1 ments of thecommutator are through a pole changer A1, B1, C1, D1, and E1. The'armaturesof the pole changers are normally held against the contactsA2, B2, C21 E2 and E2 -bv-their s rines ener 'zinc all of the sew i e, b

ments With current of similar polarities. The magnets A3, B3, C3, lDnand E3 of the pole changers are in circuit with correspond-- ing contactbars 47 and When-a given bell t crank el lis operated to close itscontact 41,

lbreakers and magnets 3G. The armature 37 will -then -bc attracted andin carrying with it the iframetl will operate the escapenicnt dogs 3f),allowing thc armature 'S7 to recede by action ot' the rcti'uctilugsinking 38 and causing thc lower projections oi' the bell cranks ll tocontact with the rais-cd pins its, c nloo 'esta of thelnert `group, thusclosing correspond ing?,i circuits to the group of segments marked A.,B', C, D and E, impulses from these ser,Fm

ments will be transmitted to the line when the brush 4:6 travels overthem.V

To prevent transmitting characters directly after they have been set upin the' Wheel so as to rive the operator an opportunity to erase acharacter or even an entire Word, should he have made an error instriking the keys, I provide; referring to Fig. 4, a circuit breaker 52includedin the circuit 50. The circuit breaker 52 is actuated' by a cam53 attached to the segments 35. Cam 53 engages the projection 52 ofcircuit breaker 52 to open it when the transmitting;` head comes to aposition approximately Contact 9 and battery 55 as shown in Fig. 7.

rioting upon this circuit breaker is a cam 56 attached to the segment35i-.as shown in Fig. 4. The cani 56 acts upon'circuit breaker 54 too-penv it when the transmitting head comes to the extreme advancedposition or in other Words, when the storage Wheel is entirely lfilledWith untransmitted characters, the

purpose being to prevent blocking the mech-A anism shoulf the operatorattempt to set up characters after the Wheel is filled withuntransmitted characters.

Directly vabove the storage Wheel and alongside oi the setting upmechanism, l provide a shoe 57 which acts upon the pins to depressthemas the storage Wheel turns under it so that all the pinsof a' groupWill normally be in a non-transmitting position at the point directlyabove the levers 6. The shoe 57 is beveled on both sides as shown inFig, ll and Willact to depress the pins 'if the Wheel is turned ineither direction.

Electrical l'connection-to the contact blocks 4:7 and magnets 36 of thetransmitting head is made by Wires passingthrough the hollow shaft 33.The contact blocks 47 are insulated from the frame of the machine.

To indicate to an operator the position a letter will occupy in the linewhen the machine is used in connection With page printing telegraphs, lprovide a character counter as shown in Figs. 9 and l0. This devicecomprises a pointer 58 carried by a ratchet segment 59 pivoted on theframe. The end of the pointer travels over a scale 60 which is dividedto correspond With the letter spacing of the receiving printer. Alsopiyoted on the 4trame is a lever 61, which carries at one end a ieedpawl 62. rihe opposite end oi the leyer G1 is connected by a link 63 andatrasos a depending rod te to the lever ilse that when the lever isoperated the feed pawl 62 will operate on the ratchet 59 to feed thesame forward a distance of one tooth.

The travel of lever 6l is limited by stops 65 and 66 and to prevent theadjustment of these stops interfering withthe travel o.- lever vlll, Iprefer to insert a spring 67`in the lever 61 which will take up anyextramotion ofthe lever 11, spring' 67 being surh iciently. strong; tooperate the lever 61 tok eiiectively feed the ratchet-59. Fastened to'the ratchet 59 but insulated therefrom is e 3 Contact spring B8 whichwhen oontactinn` with the screw 68 closes the circuit o 4indi-- l catorlamp 69 tlirou,.fa,fh.A ai battery 76., link return mechanism of theprinter.. perated by the carriage return key 7i is a bell crank .72which acts on a release pawl. In disn engaging from the ratchet Segmentthe nose .of the feed pawl 64; acts upon the feed par/l 62 to Withdrawvit from the ratchet lreleas'- ing the segment and allowing the pointerto resume the zero position. To prevent the feed pawls engaging theratchet segment be# fore the pointer is returned to the :zero posi*tion, l provide a catch 75, which engages a projectionl of the feed pawl74When it is ref leased from the 'ratchet holding niturntil. a

pin 76 fastened to the ratchet segmentl strikes the catch 75 to releasethe feed pawl 74. l'provide a Aspring:1 77 which acts on the segment59'to return it and the pointer to the zero position when it isreleased. 'To cushion their return motion, l provide a dash pot andplunger 78.

The transmitter shown and described herein is designed for use with theBaudet system. In this system the alphabet is made up with five unitswhich in my transmitter are represented by the groups ofL pins, circuitbreakers and commutator segments. Although I have shown the present,trans-- mitter adapted to the BaudotI system, its

use is not limited to it but may be used as a transmitter for anyprinting tele repli system, it being necessary merely to mange the codeand for some systems the number of pins, circuit breakers andcommutator' segments in a group.

I have shown the circuit breakers 4l in ar normally open positionto suitthe present construction. vIt is however evident that these may be alsonormally closed or they may be'constructed to both open and closer.l

v' To make the change 1t 1s necessary only to fix the contacts either onthe under side ot' lll ' the circuit controllers nerveus the ubperarno'of thebell crank, or ifit 1s desired to both open and close'.contacts, to piace contacts on both sidesof the arm.

The Words vcircuit closcrs mentioned the claims are used as aconvenience and describe the present construction. lt is hoW.everuwithin the meamng or' the lphrase to use circuit breakers orcontacts to both open and close.'

What l'claim and desire to ysecure by Letters'Pat/ent is: l I

l. ln" a telegraph transmitter,astorage member, carrymgygronps ofcircult controllers, means for setting' up combinationsl of said groups4of circuit controllers-inr transmitting and non-transmitting positions,a group of circuit closers, means to .bring the circuit closers intoengagement withgroups or" -circuit'fcontrollers successivelylv `and amaster transmitter to control the action of uponl ythe circuit closers.i

2,- ln a telegraph transmi a movable carrier, circuit controllers)carried thereby,

a keyboard selecting mechanism to -set the circuit controllers intransmitting position, avratchet feed mechanism operated by anelectromagnet to advance the movable cary rier equal distances each timea key bar is operated', said ratchet leed mechanism comprising ratchetswith reversed teeth7 stop parvis engaging the said ratchets to hold sameagainst moving in either direction, and means to disengage 4one of thestop parvis 'when the feed mechanism is operated.v

ln a telegraph transmitter', a movable carrier, circuitcontrollerscarried thereby, a keyboard selecting-mechanism to set thecircuit controllers in transmitting position,

retract the movable carrier equal distances,

feed parvis 'normally in engagement with the ratchets, an interlockingmember/and means tooperate 'said interlocking member to disengage a feedpawl and stop pavvl l holding the said ieed'vvheel against rotation in agiven direction 'when the ratchet is to be turned bythe eed'mecbauism inthat direction., v @j 1-, j

ln telegragh transmitter, a movable circuit controllers carried thereby,

a keyboard selecting mechanism to set the circuit controllers intransmitting position, a lixed depressing shoe placed with relation tothe movable carrier to restore the circuit controllersl tonon-transmitting position When the movable carrier isadvancofl, and adepressing shoe operated from the keyboard vto restore the circuitcontrollers to nontransmitting position when 'the movable carrierretracted. 4

-6. In a telegraph transmitter, a movable carrier, circuit controllerscarried thereby, a keyboard selecting mechanism to sot the circuitcontrollers in transmitting position, means to advance "the movablecarrier equal distances, separate means to retract the movablecarrierequa'l distances, an erasure' bar, and a depressing shoeconnected to said erasure bar to set a group of circuit controllers innon-transmitting position.

7. lua telegraph transmitter, 'a movable carrier, circuitrcontrollerscarried thereby, azkeybcard selecting mechanism to set the 'circuitfcontrollers in transmitting position, an erasure bar, a leed mechanismoperated by the keyboard to advance the movable car rer equal distances,a separate feed mechanism to retract the movable, carrier equal il ddistances and operated by said erasure bar,

and an interlocking member vluetvveen the advancing feed mechanism and.the retract- 'ing feed mechanism to disengage one when the other isoperated. A

8. ln a telegraph transmitter, a nfnnfableY carrier, circuit controllerscarried thereby, a keyboard selectingl mechanism to set'the circuitcontrollers in transmitting position, a ratchet"mounted on the movablecarrier, a transmitting head, a slide mounted in the transmittin head,escapement dogsV carried by said sli e, an electromagnet mounted on thetransmitting head coperating with an larmature mounted on the slide, anda spring to turn the transmitting head to engage the 'escapement dogswith the ratchet.

e 9. in a telegraph, transmitter, a movable carrier, circuit controllerscarried thereby,A a keyboard selecting; mechanism to set the circuirJcontrollers in transmitting position, a

4transmittinghead comprising a Agroup of lll) circuit closers 'and 'anelectromagnet to bring said circuit closers into engagement with thecircuit controllers, a master transmitter comprising contact devices,said Contact de vices connected individually to the circuit' closers anda contact operated by the masbei' transmitter tocontrol theraction otthe magnet in'- tbe transmitting head.

' 10. In a telegraph transmitter, a movable carrier, v adjustablecircuit' controllers carried thereby, a keyboard selecting mechato setthe circuit controllers in transkeyboar'd to advance theV movablecarrier equal. ences, a transmitting head carryres v mitting position,meansl controlled by the vree ing a group oit' circuit closers tooperate in conjunction with the circuit controllers, and means operatedby the position of the transmitting head to control the advancingmovenient of the movable carrier.

l1. In atelegraph transmitter, a movable carrier, circuit controllerscarried thereby, a keyboard selecting mechanism to set the circuitcontrollers in transmitting position, a transmitttig head carrying agroup of circuit closers and a magnet to bring said circuit closers intoengagement With successive groups of circuit controllers, a circuitbreaker included in the circuit of said electromagnet, and means tocontrol the open or closed 'position of said circuit breaker i by thetransmitting head.

l2. In atelegraph transmitter, a character counter comprising a scale, apointer operating in conjunction therewith, a ratchet to which saidpointer is connected, a feed paWl cooperating With said ratchet and anda Contact operated by the ratchet toV ignite an indicator lamp.

13. In a telegraph transmitter, a charac- .ter counter comprising ascale, a pointer operating in conjunction therewith, a ratchet to Whichsaid [pointer is connected, a feed pavvl cooperating with said ratchetand means to operate said feed pawl to turn the ratchet each time a keybar is depressed, a retaining pawl coperating` with the ratchet andmeans to lift the retainingand feed pawls from engagement with theratchet by a key in the keyboard.

In testimony whereof I have hereuntoA signed my name in the presence oftwo subscribing Witnesses. EDWARD E. KLEINSCHMIDT. Witnesses:

M. E. McNiNcH,

CHARLES S. JONES.

